【简答题】正四棱锥 中, ,则它的体积为 ____.
【多选题】Which of the following statements are true about exclamation marks?
A.
They are used to downplay a sentence.
B.
They can express intense emotions such as anger and joy .
C.
They are usually placed at the end of a sentence.
D.
Exclamation marks are a form of punctuation.
【判断题】10 All the goods in garage sale are unwanted items from the
household.
【单选题】The household goods __________ of great concern to the family with a new house.